{
\def\sym#1{\ifmmode^{#1}\else\(^{#1}\)\fi}
\begin{tabular}{l*{4}{c}}
\hline\hline
                    &\multicolumn{1}{c}{(1)}&\multicolumn{1}{c}{(2)}&\multicolumn{1}{c}{(3)}&\multicolumn{1}{c}{(4)}\\
                    &\multicolumn{1}{c}{Exporter}&\multicolumn{1}{c}{Exporter}&\multicolumn{1}{c}{Non-exporter}&\multicolumn{1}{c}{Non-exporter}\\
\hline
Exposed             &      0.0640\sym{**} &      0.0728\sym{***}&    -0.00226         &    -0.00229         \\
                    &      (2.48)         &      (2.72)         &     (-0.39)         &     (-0.41)         \\
[1em]
Constant            &    -0.00302         &     -0.0811         &    -0.00380         &      0.0451         \\
                    &     (-0.17)         &     (-0.27)         &     (-1.24)         &      (0.84)         \\
\hline
FirmControls        &           N         &           Y         &           N         &           Y         \\
N                   &          92         &          92         &          56         &          56         \\
RSqr                &      0.0510         &       0.113         &     0.00307         &      0.0798         \\
\hline\hline
\multicolumn{5}{l}{\footnotesize \textit{t} statistics in parentheses}\\
\multicolumn{5}{l}{\footnotesize \sym{*} \(p<0.1\), \sym{**} \(p<0.05\), \sym{***} \(p<0.01\)}\\
\end{tabular}
}
